JP6551294B2 - Electrical components using a curable polyurethane resin composition - Google Patents
Electrical components using a curable polyurethane resin composition Download PDFInfo
- Publication number
- JP6551294B2 JP6551294B2 JP2016088314A JP2016088314A JP6551294B2 JP 6551294 B2 JP6551294 B2 JP 6551294B2 JP 2016088314 A JP2016088314 A JP 2016088314A JP 2016088314 A JP2016088314 A JP 2016088314A JP 6551294 B2 JP6551294 B2 JP 6551294B2
- Authority
- JP
- Japan
- Prior art keywords
- epoxy group
- resin composition
- castor oil
- acrylic polymer
- containing acrylic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000011342 resin composition Substances 0.000 title claims description 51
- 229920005749 polyurethane resin Polymers 0.000 title claims description 39
- 150000003077 polyols Chemical class 0.000 claims description 112
- 125000003700 epoxy group Chemical group 0.000 claims description 92
- 239000004359 castor oil Substances 0.000 claims description 74
- 235000019438 castor oil Nutrition 0.000 claims description 73
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 73
- 229920005862 polyol Polymers 0.000 claims description 72
- 229920000058 polyacrylate Polymers 0.000 claims description 71
- 239000005056 polyisocyanate Substances 0.000 claims description 38
- 229920001228 polyisocyanate Polymers 0.000 claims description 38
- 229920002635 polyurethane Polymers 0.000 claims description 30
- 239000004814 polyurethane Substances 0.000 claims description 30
- 239000003566 sealing material Substances 0.000 claims description 15
- 238000012360 testing method Methods 0.000 description 25
- 239000003795 chemical substances by application Substances 0.000 description 18
- 230000007062 hydrolysis Effects 0.000 description 15
- 238000006460 hydrolysis reaction Methods 0.000 description 15
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 14
- 239000000203 mixture Substances 0.000 description 13
- 238000001723 curing Methods 0.000 description 12
- 239000000758 substrate Substances 0.000 description 11
- 230000000704 physical effect Effects 0.000 description 10
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 125000000524 functional group Chemical group 0.000 description 7
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 6
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 6
- 239000004593 Epoxy Substances 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000003981 vehicle Substances 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 3
- -1 carbodiimide compound Chemical class 0.000 description 3
- 239000003985 ceramic capacitor Substances 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013008 moisture curing Methods 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000000539 dimer Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- 238000013007 heat curing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002075 main ingredient Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229920005906 polyester polyol Polymers 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- WBHHMMIMDMUBKC-XLNAKTSKSA-N ricinelaidic acid Chemical compound CCCCCC[C@@H](O)C\C=C\CCCCCCCC(O)=O WBHHMMIMDMUBKC-XLNAKTSKSA-N 0.000 description 2
- 229960003656 ricinoleic acid Drugs 0.000 description 2
- FEUQNCSVHBHROZ-UHFFFAOYSA-N ricinoleic acid Natural products CCCCCCC(O[Si](C)(C)C)CC=CCCCCCCCC(=O)OC FEUQNCSVHBHROZ-UHFFFAOYSA-N 0.000 description 2
- 239000013638 trimer Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- 229930185605 Bisphenol Natural products 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 1
- 150000001718 carbodiimides Chemical class 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000779 depleting effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical group OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- IWELDVXSEVIIGI-UHFFFAOYSA-N piperazin-2-one Chemical class O=C1CNCCN1 IWELDVXSEVIIGI-UHFFFAOYSA-N 0.000 description 1
- 150000003053 piperidines Chemical class 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/36—Hydroxylated esters of higher fatty acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
- C08K5/1515—Three-membered rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/08—Homopolymers or copolymers of acrylic acid esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Polyurethanes Or Polyureas (AREA)
- Sealing Material Composition (AREA)
- Epoxy Resins (AREA)
- Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
- Organic Insulating Materials (AREA)
Description
本発明は、硬化性ポリウレタン系樹脂組成物を用いた電装部品に関する。 The present invention relates to electrical component using the hardening polyurethane resin composition.
ポリオールにポリイソシアネートを反応させて得られるポリウレタン樹脂は、各種電装部品に広く用いられている。なかでもヒマシ油系ポリオールを原料とするポリウレタン樹脂は、比較的安価で汎用性に優れ、高い絶縁性を有することから、電装部品用の封止材として有用である。ただし、ヒマシ油の不飽和脂肪酸に由来する二重結合を含むことから、高温環境下に長時間置かれることで硬くなったり、骨格のエステル結合が水分を含む雰囲気中で加水分解して軟化したりする。そのため、特に、高温高湿の使用環境下において、時間経過と共に物性が低下する問題があった。 Polyurethane resins obtained by reacting a polyisocyanate with a polyol are widely used in various electric parts. Among them, polyurethane resins based on castor oil-based polyols are useful as sealing materials for electrical components because they are relatively inexpensive, excellent in versatility, and highly insulating. However, since it contains double bonds derived from unsaturated fatty acids of castor oil, it hardens when left in a high temperature environment for a long time, or the ester bond of the skeleton hydrolyzes and softens in an atmosphere containing moisture. To For this reason, there is a problem that the physical properties deteriorate with time, particularly in a high temperature and high humidity use environment.
エステルの加水分解に対しては、例えば、カルボジイミド化合物又はエポキシ化合物を添加して、加水分解で生成するカルボン酸と、あるいはカルボン酸とアルコールの両方と結合させることで、物性低下を抑制する技術が知られている。一例として、特許文献1には、特定のポリカルボジイミド、ピペリジン誘導体及びピペラジノン誘導体の少なくとも1種の化合物を、加水分解抑制剤としてエステルと共存させる方法が開示されている。 For hydrolysis of esters, for example, there is a technology that suppresses deterioration of physical properties by adding a carbodiimide compound or an epoxy compound, and bonding with carboxylic acid generated by hydrolysis or both carboxylic acid and alcohol. Are known. As an example, Patent Document 1 discloses a method in which at least one compound of a specific polycarbodiimide, a piperidine derivative, and a piperazinone derivative is allowed to coexist with an ester as a hydrolysis inhibitor.
しかしながら、カルボジイミド化合物は、そのほとんどが粉末状の固体で、硬化前のウレタン原料に対する相溶性に難がある。相溶化させるには一旦加温する必要があり、その工程が煩雑であるだけでなく、末端官能基に悪影響を及ぼす懸念があった。一方、エポキシ化合物を添加すると、硬化物が硬くなり、封止材の柔軟性が低下する問題がある。そのために、特に車載用のように、低温と高温を繰り返す環境下では、各部の収縮に封止材が追従することができずにクラックが入ったり、部品から剥がれたりする懸念があった。このように、車載用電装部品に適用されて要求される物性を維持できる封止材は未だ得られていない。 However, most of the carbodiimide compounds are powdery solids and have a difficulty in compatibility with the urethane raw material before curing. In order to make it compatibilized, it is necessary to warm once, and not only the process is complicated, but also there is a concern that the terminal functional group may be adversely affected. On the other hand, when an epoxy compound is added, the cured product becomes hard and there is a problem that the flexibility of the sealing material is lowered. For this reason, particularly in an in-vehicle environment, there is a concern that the sealing material cannot follow the contraction of each part and cracks occur or peels off from the parts, in an environment where low and high temperatures are repeated. Thus, the sealing material which can be applied to the vehicle-mounted electrical component and can maintain the required physical property has not yet been obtained.
本発明は、かかる課題に鑑みてなされたもので、車載用電装部品の封止材への適用が可能であり、硬化物の耐加水分解性を向上させて高温高湿環境下での物性低下を抑制することができる硬化性ポリウレタン系樹脂組成物を用いた電装部品を提供しようとするものである。 The present invention has been made in view of such problems, and is applicable to a sealing material for automotive electrical components, and improves the hydrolysis resistance of a cured product to reduce physical properties in a high temperature and high humidity environment. is intended to provide electrical components with curable polyurethane resin composition can be suppressed.
本発明の一態様は、硬化性ポリウレタン系樹脂組成物の硬化物からなる封止材(2)にて、電子部品(3)が被覆されている、電装部品(1)であって、
上記硬化性ポリウレタン系樹脂組成物は、ヒマシ油系ポリオールと、ポリイソシアネートと、エポキシ基含有アクリルポリマーとを含有する、硬化性ポリウレタン系樹脂組成物を用いた電装部品にある。
One aspect of the present invention is an electrical component (1), wherein an electronic component (3) is coated with a sealing material (2) made of a cured product of a curable polyurethane resin composition,
The above-mentioned curable polyurethane resin composition is an electric component using a curable polyurethane resin composition containing a castor oil-based polyol, a polyisocyanate and an epoxy group-containing acrylic polymer.
なお、括弧内の符号は、参考のために付したものであり、本発明はこれら符号により限定されるものではない。 Na us, reference numerals in parentheses, are used in order of reference, the present invention is not limited by these codes.
上記硬化性ポリウレタン系樹脂組成物は、ヒマシ油系ポリオールと、ポリイソシアネートとが反応してウレタン結合を形成し、ポリウレタン硬化物となる。この硬化物に含有されるエポキシ基含有アクリルポリマーは、硬化物の耐加水分解性を向上させる機能を有する。これは、エポキシ基が、ヒマシ油系ポリオールに由来するエステル結合の加水分解によって生成するカルボン酸と、あるいはカルボン酸及びアルコールの両方と反応可能であり、新たな結合が形成されることで、加水分解による軟化を抑制するものと推測される。また、エポキシ基含有アクリルポリマーがヒマシ油系ポリオール及びポリイソシアネートと相溶性を有するので、硬化性ポリウレタン系樹脂組成物の調製が容易である。さらに、硬化性ポリウレタン系樹脂組成物の硬化物は硬くなりすぎないので、車載用の電装部品への適用が可能である。 In the curable polyurethane resin composition, a castor oil-based polyol and polyisocyanate react to form a urethane bond to form a polyurethane cured product. The epoxy group-containing acrylic polymer contained in the cured product has a function of improving the hydrolysis resistance of the cured product. This is because the epoxy group can react with the carboxylic acid generated by hydrolysis of the ester bond derived from the castor oil-based polyol, or with both the carboxylic acid and the alcohol, and a new bond is formed. It is presumed to suppress softening due to decomposition. Moreover, since the epoxy group-containing acrylic polymer is compatible with the castor oil-based polyol and polyisocyanate, the preparation of the curable polyurethane-based resin composition is easy. Furthermore, since the cured product of the curable polyurethane resin composition does not become too hard, it can be applied to in-vehicle electrical components.
したがって、硬化性ポリウレタン系樹脂組成物の硬化物からなる封止材は、耐加水分解性に優れ、物性の低下を抑制して、高温高湿環境下における電装部品の耐久性を大きく上昇させることができる。 Therefore, a sealing material made of a cured product of a curable polyurethane resin composition has excellent hydrolysis resistance, suppresses deterioration of physical properties, and greatly increases the durability of electrical components in a high temperature and high humidity environment. Can.
(実施形態1)
以下に、硬化性ポリウレタン系樹脂組成物を用いた電装部品の実施形態1を、図面に基づいて説明する。図1に一例を示すように、電装部品1は、例えば、車載用の電子制御ユニット(すなわち、ECU)であり、硬化性ポリウレタン系樹脂組成物は、電装部品1用の封止材2として用いられる。電装部品1は、樹脂製のケース11と、ケース11内に収容される基板4と、基板4に実装される各種電子部品3とを有している。封止材2は、硬化性ポリウレタン系樹脂組成物がケース11内に注入されて硬化した硬化物からなり、電子部品3を含む基板4の全体を被覆している。電子部品3としては、例えば、基板4の表面(すなわち、図中の上面)に複数のセラミックコンデンサ31、32が、裏面(すなわち、図中の下面)にはエンジン制御用のICチップ33が搭載される。
(Embodiment 1)
Below, Embodiment 1 of the electrical component using a curable polyurethane-type resin composition is demonstrated based on drawing. As an example is shown in FIG. 1, the electrical component 1 is, for example, an electronic control unit (that is, an ECU) for vehicle use, and the curable polyurethane resin composition is used as a
基板4は、例えば、公知のプリント配線基板からなり、絶縁板の両面に配線の一部となる導電層51〜53が形成されている。複数のセラミックコンデンサ31、32は、基板4の表面に形成される導電層51、導電層52に、それぞれ図示しない半田層等を介して接続される。また、ICチップ33は、基板4の裏面に形成される導電層53に、ボンディングワイヤ54を介して接続される。基板4の外周部には、外部接続端子55、56が設けられて、ケース11壁を貫通して外部へ延出している。
The board | substrate 4 consists of a well-known printed wiring board, for example, and the conductive layers 51-53 used as a part of wiring are formed in both surfaces of the insulating board. The plurality of
硬化性ポリウレタン系樹脂組成物は、ヒマシ油系ポリオール(a1)と、ポリイソシアネート(a2)と、エポキシ基含有アクリルポリマー(B)とを含有する。この硬化性ポリウレタン系樹脂組成物は、ヒマシ油系ポリオール(a1)と、ポリイソシアネート(a2)と、エポキシ基含有アクリルポリマー(B)とを全て含む混合物に限らず、ヒマシ油系ポリオール(a1)の少なくとも一部とポリイソシアネート(a2)の少なくとも一部とが反応して得られるプレポリマーを含む構成、ヒマシ油系ポリオール(a1)とポリイソシアネート(a2)とエポキシ基含有アクリルポリマー(B)のうちの一部が別体に設けられた構成をも含む概念である。 The curable polyurethane-based resin composition contains a castor oil-based polyol (a1), a polyisocyanate (a2), and an epoxy group-containing acrylic polymer (B). This curable polyurethane-based resin composition is not limited to a mixture containing castor oil-based polyol (a1), polyisocyanate (a2), and epoxy group-containing acrylic polymer (B), but castor oil-based polyol (a1). Of a prepolymer obtained by reacting at least a part of polyisocyanate (a2) with castor oil-based polyol (a1), polyisocyanate (a2), and epoxy group-containing acrylic polymer (B) It is a concept that also includes a configuration in which some of them are separately provided.
一部が別体に設けられた構成としては、例えば、ヒマシ油系ポリオール(a1)とエポキシ基含有アクリルポリマー(B)の混合物と、この混合物と別体に設けられたポリイソシアネート(a2)とを有する構成、ポリイソシアネート(a2)とエポキシ基含有アクリルポリマー(B)の混合物と、この混合物と別体に設けられたヒマシ油系ポリオール(a1)とを有する構成、ヒマシ油系ポリオール(a1)とポリイソシアネート(a2)の混合物と、この混合物と別体に設けられたエポキシ基含有アクリルポリマー(B)とを有する構成、ヒマシ油系ポリオール(a1)とポリイソシアネート(a2)とエポキシ基含有アクリルポリマー(B)とが、それぞれ別体に設けられた構成を含むことができる。 Examples of the structure in which a part is provided separately include, for example, a mixture of a castor oil-based polyol (a1) and an epoxy group-containing acrylic polymer (B), and a polyisocyanate (a2) provided separately from the mixture. A composition having polyisocyanate (a2) and an epoxy group-containing acrylic polymer (B), and a composition having a castor oil-based polyol (a1) provided separately from the mixture, a castor oil-based polyol (a1) And a polyisocyanate (a2) mixture, and an epoxy group-containing acrylic polymer (B) provided separately from the mixture, castor oil-based polyol (a1), polyisocyanate (a2), and epoxy group-containing acrylic The polymer (B) may include a configuration provided separately.
具体的には、硬化性ポリウレタン系樹脂組成物は、ヒマシ油系ポリオール(a1)を含む主剤と、ポリイソシアネート(a2)を含む硬化剤を用意し、硬化時に主剤と硬化剤を混合する2液混合型であっても、あるいは、空気中の水分と反応させる1液湿気硬化型であってもよい。2液混合型とする場合は、主剤がヒマシ油系ポリオール(a1)とエポキシ基含有アクリルポリマー(B)を含み、硬化剤がポリイソシアネート(a2)を含む構成、あるいは、主剤がヒマシ油系ポリオール(a1)を含み、硬化剤がポリイソシアネート(a2)とエポキシ基含有アクリルポリマー(B)を含む構成のいずれであってもよい。1液湿気硬化型とする場合は、ヒマシ油系ポリオール(a1)の水酸基とポリイソシアネート(a2)とを予め反応させて、末端にイソシアネート基を有するウレタンプレポリマーとしたものに、エポキシ基含有アクリルポリマー(B)を添加することで、硬化性ポリウレタン系樹脂組成物が得られる。 Specifically, the curable polyurethane-based resin composition is a two-component solution in which a main agent containing a castor oil-based polyol (a1) and a curing agent containing a polyisocyanate (a2) are prepared, and the main agent and the curing agent are mixed during curing. It may be a mixed type, or may be a one-part moisture curing type that is reacted with moisture in the air. In the case of a two-component mixed type, the main agent includes a castor oil-based polyol (a1) and an epoxy group-containing acrylic polymer (B), and the curing agent includes a polyisocyanate (a2), or the main agent is a castor oil-based polyol. Any of the structures containing (a1) and containing a polyisocyanate (a2) and an epoxy group-containing acrylic polymer (B) may be used. In the case of a one-component moisture-curing type, an epoxy group-containing acrylic is added to a urethane prepolymer having an isocyanate group at the terminal by reacting the hydroxyl group of castor oil-based polyol (a1) with polyisocyanate (a2) in advance. A curable polyurethane resin composition can be obtained by adding the polymer (B).
硬化性ポリウレタン系樹脂組成物は、2液混合型の場合は、ヒマシ油系ポリオール(a1)と、ポリイソシアネート(a2)との反応によりウレタン結合して硬化し、硬化物となる。1液混合型の場合、ウレタンプレポリマーは、ヒマシ油系ポリオール(a1)と、ポリイソシアネート(a2)との反応によるウレタン結合と、末端イソシアネート基とを有し、この末端イソシアネート基が水分と反応して硬化し、硬化物となる。すなわち、硬化物は、ヒマシ油系ポリオール(a1)由来の構造単位とポリイソシアネート(a2)由来の構造単位とからなるポリウレタン(A)と、エポキシ基含有アクリルポリマー(B)とを含有する。このとき、エポキシ基含有アクリルポリマー(B)は、ポリウレタン(A)の耐加水分解性を向上させ、硬化物の物性低下を抑制する機能を有する。 In the case of the two-component mixed type, the curable polyurethane-based resin composition is cured by urethane bonding through a reaction between the castor oil-based polyol (a1) and the polyisocyanate (a2), and becomes a cured product. In the case of the one-component mixed type, the urethane prepolymer has a urethane bond by a reaction between a castor oil-based polyol (a1) and a polyisocyanate (a2) and a terminal isocyanate group, and this terminal isocyanate group reacts with moisture. And cure to form a cured product. That is, the cured product contains a polyurethane (A) composed of a structural unit derived from castor oil-based polyol (a1) and a structural unit derived from polyisocyanate (a2), and an epoxy group-containing acrylic polymer (B). At this time, the epoxy group-containing acrylic polymer (B) has a function of improving the hydrolysis resistance of the polyurethane (A) and suppressing a decrease in physical properties of the cured product.
ポリウレタン(A)の生成において、主剤となるヒマシ油系ポリオール(a1)としては、ヒマシ油又はヒマシ油誘導体が挙げられる。ヒマシ油は、リシノレイン酸を主成分とする脂肪酸とグリセリンとのエステルであり、リシノレイン酸に由来する水酸基と二重結合とを有している。ヒマシ油誘導体としては、例えば、ヒマシ油の部分脱水縮合物、ヒマシ油と低分子ポリオール、ポリエーテルポリオール又はポリエステルポリオール等とのエステル交換物、又はそれらの水素添加物等が挙げられる。ヒマシ油又はヒマシ油誘導体の低分子重合体であってもよい。ヒマシ油系ポリオール(a1)は、これらヒマシ油又はヒマシ油誘導体から選ばれる1種または2種以上を含むことができる。 In the production | generation of a polyurethane (A), a castor oil type | system | group polyol (a1) used as a main ingredient includes a castor oil or a castor oil derivative. Castor oil is an ester of glycerin and a fatty acid mainly composed of ricinoleic acid, and has a hydroxyl group and a double bond derived from ricinoleic acid. Examples of the castor oil derivative include a partially dehydrated condensate of castor oil, a transesterification product of castor oil and a low molecular polyol, a polyether polyol or a polyester polyol, or a hydrogenated product thereof. A low molecular weight polymer of castor oil or castor oil derivative may be used. The castor oil-based polyol (a1) can contain one or more selected from these castor oils or castor oil derivatives.
ヒマシ油系ポリオール(a1)は、例えば、官能基(すなわち、水酸基)数が1〜8、好ましくは2〜6程度、水酸基価が10〜500、好ましくは50〜200程度、酸価が10以下、好ましくは5以下であるものが使用される。官能基数が1より小さいと、架橋密度が低くなり耐熱性・耐湿熱性に劣る硬化物となるおそれがある。一方、官能基数が8より大きいと、架橋密度が高くなり硬化物が脆くなりやすい。また、水酸基価は、10より小さいと架橋密度が低くなって耐熱性・耐湿熱性に劣る硬化物となり、500より大きいと架橋密度が高くなって硬化物が脆くなってしまうおそれがある。また、酸価が10より大きいと、その酸性により、耐久劣化速度が速くなってしまうおそれがある。このようなヒマシ油系ポリオール(a1)の市販品としては、例えば、伊藤製油社製の「URIC H−30、H−62、H−1824」、「POLYCASTOR♯10」等が挙げられる。 The castor oil-based polyol (a1) has, for example, a functional group (ie, hydroxyl group) number of 1 to 8, preferably about 2 to 6, a hydroxyl value of 10 to 500, preferably about 50 to 200, and an acid value of 10 or less. , Preferably 5 or less is used. When the number of functional groups is smaller than 1, there is a possibility that the crosslink density will be low, and a cured product inferior in heat resistance and moisture and heat resistance will be obtained. On the other hand, when the number of functional groups is larger than 8, the crosslinking density is high and the cured product tends to be brittle. On the other hand, if the hydroxyl value is less than 10, the crosslinking density is low and the cured product is inferior in heat resistance and moist heat resistance. If the hydroxyl value is more than 500, the crosslinking density is increased and the cured product may be brittle. If the acid value is greater than 10, the acidity may increase the durability deterioration rate. Examples of such commercially available castor oil-based polyol (a1) include “URIC H-30, H-62, H-1824” and “POLYCASTOR # 10” manufactured by Ito Oil Co., Ltd.
ポリウレタン(A)は、主剤となるヒマシ油系ポリオール(a1)に、硬化剤となるポリイソシアネート(a2)を添加して、加熱硬化させることにより得られる。ポリイソシアネート(a2)は、特に制限されず、通常のポリウレタンの製造において使用されるものがいずれも好適に使用される。具体的には、ヘキサメチレンジイソシアネート(すなわち、HDI)、イソホロンジイソシアネート(すなわち、IPDI)等の脂肪族ポリイソシアネート、2,4−又は2,6−トリレンジイソシアネート(すなわち、TDI)、2,2’−、2,4’−又は4,4’−ジフェニルメタンジイソシアネート(すなわち、MDI)等の芳香族ポリイソシアネート、及びこれらのカルボジイミド変性等による2量体、イソシアヌレート環形成による3量体等の変性ポリイソシアネート等が挙げられる。なかでも、芳香族ポリイソシアネートの2量体又は3量体変性物は、凝集力が高いことから、耐熱性・耐湿熱性に優れるため、特に好ましい。ポリイソシアネート(a2)は、1種を単独で用いても、2種以上を併用してもよい。 The polyurethane (A) is obtained by adding a polyisocyanate (a2) as a curing agent to a castor oil-based polyol (a1) as a main agent, followed by heat curing. The polyisocyanate (a2) is not particularly limited, and any of those used in the production of a normal polyurethane is preferably used. Specifically, aliphatic polyisocyanates such as hexamethylene diisocyanate (ie HDI), isophorone diisocyanate (ie IPDI), 2,4- or 2,6-tolylene diisocyanate (ie TDI), 2,2 ′ -, 2,4'- or 4,4'-diphenylmethane diisocyanate (i.e. MDI) and other polyisocyanates, and dimers by modification with carbodiimide, trimers by isocyanurate ring formation, etc. An isocyanate etc. are mentioned. Among these, a dimer or trimer modified product of aromatic polyisocyanate is particularly preferable because of its high cohesive force and excellent heat resistance and moist heat resistance. Polyisocyanate (a2) may be used individually by 1 type, or may use 2 or more types together.
ポリウレタン(A)の生成において、硬化剤となるポリイソシアネート(a2)の市販品としては、例えば、住化コベストロウレタン社製の「SBU0632」等が挙げられる。 As a commercial item of polyisocyanate (a2) used as a hardening agent in formation of polyurethane (A), "SBU0632" made by Sumika Covestrourethane Co., Ltd. etc. are mentioned, for example.
これらヒマシ油系ポリオール(a1)とポリイソシアネート(a2)とは、一般的な主剤と硬化剤との関係になるように配合される。具体的には、ヒマシ油系ポリオール(a1)とポリイソシアネート(a2)とを、両者の官能基の当量比(すなわち、水酸基/イソシアネート基の当量比)が、例えば0.5〜1.5の範囲、好ましくは0.8〜1.2の範囲、より好ましくは0.9〜1.1の範囲となるように適宜調整することができる。 These castor oil-based polyol (a1) and polyisocyanate (a2) are blended so as to have a relationship between a general main agent and a curing agent. Specifically, the castor oil-based polyol (a1) and the polyisocyanate (a2) have an equivalent ratio of the functional groups of both (ie, a hydroxyl group / isocyanate group equivalent ratio) of, for example, 0.5 to 1.5. It can be suitably adjusted to be in the range, preferably in the range of 0.8 to 1.2, more preferably in the range of 0.9 to 1.1.
なお、ポリウレタン(A)の構造中に、ヒマシ油系ポリオール(a1)に由来する構造単位とポリイソシアネート(a2)に由来する構造単位以外の成分が含まれていてもよい。具体的には、硬化性ポリウレタン系樹脂組成物を所望の粘度に調整可能な範囲で、主剤となるヒマシ油系ポリオール(a1)以外のポリオール、例えば、アクリル系ポリオール、ポリエーテルポリオール、ポリエステルポリオール、ポリカーボネートポリオール等を使用することができる。このような場合には、ヒマシ油系ポリオール(a1)100質量部に対して、それ以外のポリオールの添加量が、例えば50重量部以下、好ましくは、30重量部以下となるようにするとよい。その他、通常のポリウレタンの製造時に用いられる可塑剤、接着付与剤、酸化防止剤等の添加剤を使用することもできる。 In the structure of polyurethane (A), components other than the structural unit derived from castor oil-based polyol (a1) and the structural unit derived from polyisocyanate (a2) may be contained. Specifically, in a range in which the curable polyurethane resin composition can be adjusted to a desired viscosity, a polyol other than the castor oil-based polyol (a1) as a main agent, for example, an acrylic polyol, a polyether polyol, a polyester polyol, Polycarbonate polyols and the like can be used. In such a case, the addition amount of the other polyol may be, for example, 50 parts by weight or less, preferably 30 parts by weight or less, with respect to 100 parts by weight of the castor oil-based polyol (a1). In addition, additives such as a plasticizer, an adhesion-imparting agent, and an antioxidant that are used in the production of ordinary polyurethane can also be used.
エポキシ基含有アクリルポリマー(B)は、ヒマシ油系ポリオール(a1)及びポリイソシアネート(a2)と共に、硬化性ポリウレタン系樹脂組成物を構成する。エポキシ基含有アクリルポリマー(B)は、アクリルポリマー骨格を有し、例えば側鎖にエポキシ基を有するアクリル系ポリマーであり、硬化物の耐加水分解性を向上させる。エポキシ基含有アクリルポリマー(B)は、エポキシ基が、ヒマシ油系ポリオール(a1)の加水分解により生成する、カルボキシ基を有するカルボン酸及び水酸基を有するアルコールのいずれとも反応性を有する。エポキシ基含有アクリルポリマー(B)は、好適には、1分子中に2個以上のエポキシ基を有することが望ましい。この場合には、エポキシ基含有アクリルポリマー(B)は、加水分解により生成するカルボキシ基と、あるいはカルボキシ基及び水酸基のそれぞれと反応して新たな結合を形成することが可能になる。また、エポキシ基含有アクリルポリマー(B)は、二重結合を有していない方が好ましい。この場合には、構造をより安定化させて、耐熱性を向上可能となる。 The epoxy group-containing acrylic polymer (B) constitutes a curable polyurethane resin composition together with the castor oil-based polyol (a1) and the polyisocyanate (a2). The epoxy group-containing acrylic polymer (B) is an acrylic polymer having an acrylic polymer skeleton, for example, an epoxy group in the side chain, and improves the hydrolysis resistance of the cured product. The epoxy group-containing acrylic polymer (B) is reactive with any of a carboxylic acid having a carboxy group and an alcohol having a hydroxyl group, which is produced by hydrolysis of a castor oil-based polyol (a1). The epoxy group-containing acrylic polymer (B) preferably has two or more epoxy groups in one molecule. In this case, the epoxy group-containing acrylic polymer (B) can react with the carboxy group generated by hydrolysis, or with each of the carboxy group and the hydroxyl group to form a new bond. Moreover, it is preferable that the epoxy group-containing acrylic polymer (B) does not have a double bond. In this case, the structure can be further stabilized and the heat resistance can be improved.
エポキシ基含有アクリルポリマー(B)は、平均分子量が10000以下であることが望ましい。平均分子量が10000以下であることで、エポキシ基含有アクリルポリマー(B)の形態を、室温で液状又は流動性を有する形態とすることが可能であり、相溶性、注型性、作業性が向上する。好適には、エポキシ基含有アクリルポリマー(B)の平均分子量は、8000以下、より好ましくは4000以下であることが望ましい。平均分子量が小さいほど低粘度となって、硬化性ポリウレタン系樹脂組成物を調製する際に、他の成分との相溶性が高くなり、注型性が向上する。 The epoxy group-containing acrylic polymer (B) preferably has an average molecular weight of 10,000 or less. When the average molecular weight is 10,000 or less, the epoxy group-containing acrylic polymer (B) can be made into a liquid or fluid form at room temperature, which improves compatibility, castability, and workability. Do. Suitably, the average molecular weight of the epoxy group-containing acrylic polymer (B) is preferably 8000 or less, more preferably 4000 or less. The smaller the average molecular weight, the lower the viscosity. When preparing the curable polyurethane resin composition, the compatibility with other components increases, and the castability improves.
エポキシ基含有アクリルポリマー(B)は、エポキシ基含有量が、0.5ミリ当量/g〜1.7ミリ当量/gの範囲にあることが望ましい。エポキシ基含有量が、0.5ミリ当量/g以上であることで、硬化物が加水分解により軟化するのを抑制する効果が高くなる。エポキシ基含有量が大きくなると、軟化の抑制効果は向上するものの硬化物が耐久後に硬くなり、柔軟性が低下するおそれがあるため、好適には、1.7ミリ当量/g以下とすることで、柔軟性を保持することができる。 The epoxy group-containing acrylic polymer (B) preferably has an epoxy group content in the range of 0.5 meq / g to 1.7 meq / g. When the epoxy group content is 0.5 meq / g or more, the effect of suppressing the softening of the cured product due to hydrolysis increases. When the epoxy group content is increased, the effect of suppressing softening is improved, but the cured product is hardened after endurance and there is a possibility that flexibility may be lowered. Therefore, it is preferable that the content is 1.7 meq / g or less. , Can maintain flexibility.
アクリルポリマー骨格を構成するアクリル系モノマーとしては、具体的には、(メタ)アクリル酸、(メタ)アクリル酸エステル、及びこれらの誘導体から選ばれる少なくとも一種を含有するモノマーが挙げられる。本明細書において、(メタ)アクリル酸は、アクリル酸又はメタクリル酸を、(メタ)アクリル酸エステルは、アクリル酸エステル又はメタクリル酸エステルを意味する。これらアクリル系モノマーの重合体又は共重合体の一部にエポキシ基を導入することで、エポキシ基含有アクリルポリマー(B)が得られる。例えば、アクリル系モノマーの一部として、エポキシ基を含む(メタ)アクリル酸エステルを用いることで、側鎖にエポキシ基を含むアクリル系ポリマーが得られる。 Specific examples of the acrylic monomer constituting the acrylic polymer skeleton include monomers containing at least one selected from (meth) acrylic acid, (meth) acrylic acid esters, and derivatives thereof. In this specification, (meth) acrylic acid means acrylic acid or methacrylic acid, and (meth) acrylic acid ester means acrylic acid ester or methacrylic acid ester. An epoxy group-containing acrylic polymer (B) is obtained by introducing an epoxy group into a part of the polymer or copolymer of these acrylic monomers. For example, by using a (meth) acrylic acid ester containing an epoxy group as a part of the acrylic monomer, an acrylic polymer containing an epoxy group in the side chain can be obtained.
エポキシ基含有アクリルポリマー(B)は、例えば、25℃における粘度が5000mPa・s以下であり、ガラス転移点(すなわち、Tg)が、例えば常温より低いものが使用される。このようなエポキシ基含有アクリルポリマー(B)の市販品としては、例えば、東亜合成社製の「UG4000」、「UG4010」等が挙げられる。 As the epoxy group-containing acrylic polymer (B), for example, one having a viscosity at 25 ° C. of 5000 mPa · s or less and a glass transition point (that is, Tg) lower than room temperature, for example, is used. As a commercial item of such an epoxy group content acrylic polymer (B), "UG4000" by "TOA SYNTHETIC CO., LTD.", "UG4010" etc. are mentioned, for example.
硬化性ポリウレタン系樹脂組成物は、例えば、ポリウレタン(A)となるヒマシ油系ポリオール(a1)及びポリイソシアネート(a2)を、所定の割合で配合し、さらにエポキシ基含有アクリルポリマー(B)を添加し、均一混合することにより得られる。このとき、硬化性ポリウレタン系樹脂組成物を加熱硬化させて得られる硬化物は、ヒマシ油系ポリオール(a1)に由来する構造単位とポリイソシアネート(a2)に由来する構造単位を含む架橋構造を有するポリウレタン(A)に、エポキシ基含有アクリルポリマー(B)が均一混合されたものとなる。 The curable polyurethane resin composition, for example, blends castor oil-based polyol (a1) and polyisocyanate (a2) to be polyurethane (A) at a predetermined ratio, and further adds an epoxy group-containing acrylic polymer (B). Obtained by uniform mixing. At this time, the cured product obtained by heat-curing the curable polyurethane resin composition has a crosslinked structure including a structural unit derived from castor oil-based polyol (a1) and a structural unit derived from polyisocyanate (a2). An epoxy group-containing acrylic polymer (B) is uniformly mixed with polyurethane (A).
また、上述したように、主剤となるヒマシ油系ポリオール(a1)と、硬化剤となるポリイソシアネート(a2)を、所定の割合となるよう用意し、それらのいずれかにエポキシ基含有アクリルポリマー(B)を、所定の割合で配合した2液混合型の組成物とすることができる。この2液混合型の主剤と硬化剤を均一混合し、加熱硬化させることで、硬化性ポリウレタン系樹脂組成物の硬化物が得られる。また、ヒマシ油系ポリオール(a1)とポリイソシアネート(a2)を予め反応させてウレタンプレポリマーを生成し、エポキシ基含有アクリルポリマー(B)を、所定の割合で添加混合した1液湿気硬化型の組成物としてもよい。この1液湿気硬化型の組成物を、水分を含む大気雰囲気中で硬化させることで、硬化性ポリウレタン系樹脂組成物の硬化物が得られる。 Further, as described above, a castor oil-based polyol (a1) serving as a main agent and a polyisocyanate (a2) serving as a curing agent are prepared in a predetermined ratio, and an epoxy group-containing acrylic polymer ( B) can be a two-component mixed composition formulated at a predetermined ratio. A cured product of the curable polyurethane-based resin composition is obtained by uniformly mixing the two-component mixed type main agent and the curing agent and curing them by heating. Further, a castor oil-based polyol (a1) and a polyisocyanate (a2) are reacted in advance to form a urethane prepolymer, and an epoxy group-containing acrylic polymer (B) is added and mixed at a predetermined ratio to form a one-component moisture-curing type. It may be a composition. A cured product of the curable polyurethane resin composition can be obtained by curing the one-component moisture-curable composition in an air atmosphere containing moisture.
ポリウレタン(A)は、構造中に加水分解性のエステル結合を有するため、水分の存在下で、カルボン酸とアルコール(すなわち、ヒマシ油系ポリオール(a1)の脂肪酸に由来するカルボキシ基とグリセリンに由来する水酸基)に分解する。一方、図2に構造例を模式的に示すように、エポキシ基含有アクリルポリマー(B)は、例えば、アクリルポリマー骨格6から側方に延びる2つの側鎖61を有する。2つの側鎖61は、それぞれ末端にエポキシ基を有する構造であり、これらエポキシ基は、硬化物中において、エステル結合の加水分解により生成するカルボキシ基又は水酸基と反応性を有する。そのため、エステル結合が切れた部位において、近接位置にあるこれらエポキシ基が、生成するカルボキシ基と、あるいはカルボキシ基と水酸基の両方と反応することが可能になり、エポキシ基含有アクリルポリマー(B)が介在する新たな結合を形成するものと推定される。これにより、硬化物の加水分解による軟化が抑制され、時間経過に伴う物性低下を抑制する効果が得られる。
Since polyurethane (A) has a hydrolyzable ester bond in the structure, it is derived from carboxylic acid and alcohol (that is, carboxy group derived from fatty acid of castor oil-based polyol (a1) and glycerin in the presence of moisture). (Depleting hydroxyl groups). On the other hand, as schematically shown in FIG. 2, the epoxy group-containing acrylic polymer (B) has, for example, two
好適には、ポリウレタン(A)中のヒマシ油系ポリオール(a1)100質量部に対して、エポキシ基含有アクリルポリマー(B)が、10質量部〜80質量部となるように添加されることが望ましい。エポキシ基含有アクリルポリマー(B)が、ヒマシ油系ポリオール(a1)に対して、好適には10質量部以上の割合で存在することで、エステル結合が加水分解したときに近接するエポキシ基と反応させて、軟化を抑制する十分な効果が得られる。エポキシ基含有アクリルポリマー(B)の配合比が増加すると、加水分解性のエステル結合に対して、反応性を有するエポキシ基の割合が増加することで、軟化を抑制する効果を高めることができる。ただし、結合していないエポキシ基含有アクリルポリマー(B)の含有量が多くなりすぎると、硬化物の硬度が逆に低下するおそれがあるため、好適には、80質量部以下の含有量とするのがよい。 Preferably, the epoxy group-containing acrylic polymer (B) is added in an amount of 10 to 80 parts by mass with respect to 100 parts by mass of the castor oil-based polyol (a1) in the polyurethane (A). desirable. The epoxy group-containing acrylic polymer (B) is preferably present at a ratio of 10 parts by mass or more with respect to the castor oil-based polyol (a1), thereby reacting with the adjacent epoxy group when the ester bond is hydrolyzed. It is possible to obtain a sufficient effect of suppressing the softening. When the compounding ratio of the epoxy group-containing acrylic polymer (B) is increased, the effect of suppressing softening can be enhanced by increasing the proportion of the epoxy group having reactivity with respect to the hydrolyzable ester bond. However, if the content of the epoxy group-containing acrylic polymer (B) that is not bonded is too large, the hardness of the cured product may be reduced, so that the content is preferably 80 parts by mass or less. That's good.
上述したように、エポキシ基含有アクリルポリマー(B)のエポキシ基含有量は、好適には、0.5ミリ当量/g〜1.7ミリ当量/gの範囲の範囲で選択されるから、ヒマシ油系ポリオール(a1)100質量部に対する配合量が、10質量部〜80質量部の範囲にある場合、ヒマシ油系ポリオール(a1)100質量部当たりの、エポキシ基含有アクリルポリマー(B)のエポキシ基含有量は、5ミリ当量(すなわち、0.5ミリ当量/g;10質量部)〜136ミリ当量(すなわち、1.7ミリ当量/g;80質量部)の範囲とすることができる。 As described above, the epoxy group content of the epoxy group-containing acrylic polymer (B) is preferably selected in the range of 0.5 milliequivalent / g to 1.7 milliequivalent / g. When the compounding amount with respect to 100 parts by mass of oil-based polyol (a1) is in the range of 10 parts by mass to 80 parts by mass, epoxy of epoxy group-containing acrylic polymer (B) per 100 parts by mass of castor oil-based polyol (a1) The group content can be in the range of 5 milliequivalents (i.e. 0.5 milliequivalents / g; 10 parts by weight) to 136 milliequivalents (i.e. 1.7 milliequivalents / g; 80 parts by weight).
なお、ポリウレタン(A)のヒマシ油系ポリオール(a1)に由来するエステル結合に対して、反応性を有するエポキシ基の割合は、エポキシ基含有アクリルポリマー(B)のエポキシ基含有量によっても変化するので、エポキシ基含有量が比較的少ない場合は、エポキシ基含有アクリルポリマー(B)の含有量を多くしてもよい。これにより、ヒマシ油系ポリオール(a1)に対するエポキシ基の割合を増加させて、軟化を抑制する効果を高めることができる。また、エポキシ基含有量が比較的多い場合は、エポキシ基含有アクリルポリマー(B)の含有量を少なくしてもよい。これにより、ポリウレタン(A)に対するエポキシ基含有アクリルポリマー(B)の配合比の増加を抑制して、硬化物の硬度の低下を抑制することができる。好適には、例えば、ヒマシ油系ポリオール(a1)100質量部当たりの、エポキシ基含有アクリルポリマー(B)のエポキシ基含有量が、10ミリ当量〜60ミリ当量となるようにするとよい。 The proportion of the epoxy group having reactivity to the ester bond derived from the castor oil-based polyol (a1) of the polyurethane (A) also changes depending on the epoxy group content of the epoxy group-containing acrylic polymer (B) Therefore, when the epoxy group content is relatively small, the content of the epoxy group-containing acrylic polymer (B) may be increased. Thereby, the ratio of the epoxy group with respect to a castor oil type | system | group polyol (a1) can be increased, and the effect which suppresses softening can be heightened. When the epoxy group content is relatively large, the content of the epoxy group-containing acrylic polymer (B) may be reduced. Thereby, the increase in the compounding ratio of the epoxy group-containing acrylic polymer (B) to the polyurethane (A) can be suppressed, and the decrease in the hardness of the cured product can be suppressed. Preferably, for example, the epoxy group content of the epoxy group-containing acrylic polymer (B) per 100 parts by mass of the castor oil-based polyol (a1) is 10 milliequivalents to 60 milliequivalents.
上記した電装部品1の封止材2とする場合には、ポリウレタン(A)の原料となるヒマシ油系ポリオール(a1)及びポリイソシアネート(a2)と、エポキシ基含有アクリルポリマー(B)とを用いて、例えば2液混合型の硬化性ポリウレタン系樹脂組成物を調製する。これを混合してケース11内に注入して、基板4と電子部品3を覆うように充填し、加熱硬化させることで、硬化物からなる封止材2とする。硬化性ポリウレタン系樹脂組成物は、ポリウレタン(A)原料に、相溶性の良好なエポキシ基含有アクリルポリマー(B)が均一混合されているので、注型性に優れ、ケース11内の基板4と電子部品3の全体を良好に覆うことができる。また、得られる硬化物には、エポキシ基含有アクリルポリマー(B)が均一に分散されているので、ポリウレタン(A)のヒマシ油系ポリオール(a1)に由来するエステル結合が加水分解しても、その周囲に存在するエポキシ基含有アクリルポリマー(B)によって、再結合させることが可能であり、架橋構造を補強して、軟化を抑制できる。
When using as the sealing
したがって、ヒマシ油系ポリオール(a1)を主剤として、低粘度で注型性、作業性の良好な硬化性ポリウレタン系樹脂組成物を得ることができ、さらに、高温高湿環境下においても耐加水分解性に優れ、高い絶縁性を有する硬化物を得ることができる。硬化性ポリウレタン系樹脂組成物の粘度は、例えば、25℃において2000mpa・s以下であることが好ましい。また、硬化物の硬度は、例えば、アスカーC硬度計による硬度が20〜60の範囲にあることが好ましい。 Therefore, it is possible to obtain a curable polyurethane-based resin composition having a low viscosity, good castability and good workability using castor oil-based polyol (a1) as a main ingredient, and further resistant to hydrolysis even in a high temperature and high humidity environment. It is possible to obtain a cured product having excellent properties and high insulation. The viscosity of the curable polyurethane resin composition is preferably, for example, 2000 mpa · s or less at 25 ° C. Moreover, as for the hardness of hardened | cured material, it is preferable that the hardness by an Asker C hardness meter is in the range of 20-60, for example.
(実施例1)
以下のようにして、硬化性ポリウレタン系樹脂組成物を調製し、硬化させて硬化物を作製した。また、得られた硬化物に対し、高温又は高温高湿条件下において熱耐久試験を行って、試験前後の物性の変化を調べた。
まず、ポリウレタン(A)の原料として、ヒマシ油系ポリオール(a1)である市販のヒマシ油ポリオール(a1−1)と、ポリイソシアネート(a2)である市販の変性MDI(a2−1)を用意した。ヒマシ油ポリオール(a1−1)としては、伊藤製油社製の「URIC H1824」(すなわち、官能基数:2.3、水酸基価:66、酸価:4.0以下)を用い、変性MDI(a2−1)としては、住化コベストロウレタン社製の「SBU0632」を用いた。また、エポキシ基含有アクリルポリマー(B)である市販のエポキシ基含有アクリルポリマー(B−1)を用意した。エポキシ基含有アクリルポリマー(B−1)としては、東亜合成社製の「UG4010」(すなわち、平均分子量:2900、エポキシ基含有量:1.4ミリ当量/g、粘度:3700mPa・s/25℃、Tg:−57℃)を用いた。
Example 1
A curable polyurethane resin composition was prepared and cured as follows to produce a cured product. In addition, the obtained cured product was subjected to a heat durability test under high temperature or high temperature and high humidity conditions to examine changes in physical properties before and after the test.
First, commercially available castor oil polyol (a1-1) which is castor oil-based polyol (a1) and commercially available modified MDI (a2-1) which is polyisocyanate (a2) are prepared as raw materials of polyurethane (A) . As castor oil polyol (a1-1), it is “URIC H1824” (that is, the number of functional groups: 2.3, hydroxyl value: 66, acid value: 4.0 or less) manufactured by Ito Oil Co., Ltd. As -1), “SBU0632” manufactured by Sumika Covestrourethane Co., Ltd. was used. Moreover, the commercially available epoxy group containing acrylic polymer (B-1) which is an epoxy group containing acrylic polymer (B) was prepared. As the epoxy group-containing acrylic polymer (B-1), “UG4010” (that is, average molecular weight: 2900, epoxy group content: 1.4 meq / g, viscosity: 3700 mPa · s / 25 ° C., manufactured by Toagosei Co., Ltd.) , Tg: −57 ° C.) was used.
100質量部のヒマシ油ポリオール(a1−1)に対して、10質量部のエポキシ基含有アクリルポリマーB1と、当量比の変性MDI(a2−1)とを、それぞれ計量して添加し、十分に撹拌して硬化性ポリウレタン系樹脂組成物を得た。 To 100 parts by mass of castor oil polyol (a1-1), 10 parts by mass of epoxy group-containing acrylic polymer B1 and equivalent ratio of modified MDI (a2-1) are respectively metered and added, and sufficiently The mixture was stirred to obtain a curable polyurethane resin composition.
次に、得られた硬化性ポリウレタン系樹脂組成物を、直径約40mm、高さ約10mmのアルミニウム製カップに注ぎ、130℃に調整した硬化炉で1時間硬化することで、硬化物を得た。得られた硬化物の粘度及び硬度を測定して、評価と共に表1に示した。粘度の測定にはB型粘度計を用い、25℃における粘度が、2000mPa・s以下であるものを良と判定し、2000mPa・sを超えるものを不可と判定した。また、硬度の測定にはアスカーC硬度計を用い、硬度20〜60の範囲にあるものを良と判定し、それ以外は不可と判定した。 Next, the obtained curable polyurethane resin composition was poured into an aluminum cup having a diameter of about 40 mm and a height of about 10 mm, and cured for 1 hour in a curing furnace adjusted to 130 ° C. to obtain a cured product . The viscosity and hardness of the obtained cured product were measured and shown in Table 1 together with the evaluation. A B-type viscometer was used for the measurement of the viscosity, and those having a viscosity at 25 ° C. of 2000 mPa · s or less were judged good, and those exceeding 2000 mPa · s were judged unacceptable. Moreover, the Asker C hardness meter was used for the measurement of hardness, and the thing in the range of hardness 20-60 was determined to be good, and other than that was determined to be impossible.
さらに、得られた硬化物を、プレッシャークッカー試験に供し、試験後の硬度を測定した。プレッシャークッカー試験は、硬化物を試験槽に収容し、121℃、2気圧、湿度100%の加湿雰囲気にて72時間保持することにより行った。また、得られた硬化物を、120℃で1000時間保持する高温耐久試験に供し、試験後の硬度を測定した。評価は、いずれも試験後のアスカーC硬度計による硬度が20〜60の範囲にあるものを良と判定し、それ以外は不可と判定した。 Furthermore, the obtained cured product was subjected to a pressure cooker test, and the hardness after the test was measured. The pressure cooker test was performed by storing the cured product in a test tank and holding it in a humidified atmosphere at 121 ° C., 2 atm and 100% humidity for 72 hours. Further, the obtained cured product was subjected to a high temperature durability test maintained at 120 ° C. for 1000 hours, and the hardness after the test was measured. As for evaluation, the thing by which the hardness by the Asker C hardness meter after a test is all in the range of 20-60 was determined to be good, and other than that was judged to be impracticable.
表1の結果に明らかなように、実施例1の硬化物は、初期粘度、初期硬度共に、判定が良であり、プレッシャークッカー試験、高温耐久試験後の硬度も良好であった。 As is clear from the results in Table 1, the cured product of Example 1 was good in both the initial viscosity and the initial hardness, and the hardness after the pressure cooker test and the high temperature durability test was also good.
(実施例2〜実施例5)
100質量部のヒマシ油ポリオール(a1−1)に対して、添加されるエポキシ基含有アクリルポリマー(B−1)を30質量部とした以外は、実施例1と同様の方法で硬化性ポリウレタン系樹脂組成物を得た(すなわち、実施例2)。また、エポキシ基含有アクリルポリマー(B)として、市販のエポキシ基含有アクリルポリマー(B−2)80質量部を用い、それ以外は、実施例1と同様の方法で硬化性ポリウレタン系樹脂組成物を得た(すなわち、実施例3)。エポキシ基含有アクリルポリマー(B−2)は、東亜合成社製の「UG4000」(すなわち、平均分子量:3000、エポキシ基含有量:0.7ミリ当量/g、粘度:3000mPa・s/25℃、Tg:−61℃)とした。
(Example 2 to Example 5)
Curable polyurethane based on the same method as in Example 1 except that 30 parts by mass of the epoxy group-containing acrylic polymer (B-1) added to 100 parts by mass of castor oil polyol (a1-1) A resin composition was obtained (ie, Example 2). Further, using 80 parts by mass of a commercially available epoxy group-containing acrylic polymer (B-2) as the epoxy group-containing acrylic polymer (B), a curable polyurethane resin composition was obtained in the same manner as in Example 1 except for this. Obtained (ie Example 3). The epoxy group-containing acrylic polymer (B-2) is “UG 4000” (that is, average molecular weight: 3000, epoxy group content: 0.7 meq / g, viscosity: 3000 mPa · s / 25 ° C., manufactured by Toagosei Co., Ltd.) Tg: −61 ° C.).
さらに、ヒマシ油系ポリオール(a1)として、市販のヒマシ油ポリオール(a1−2)100質量部を用い、これに対してエポキシ基含有アクリルポリマー(B−2)を80質量部用いて、それ以外は、実施例1と同様の方法で硬化性ポリウレタン系樹脂組成物を得た(すなわち、実施例4)。ヒマシ油ポリオール(a1−2)としては、伊藤製油社製の「POLYCASTOR♯10」(すなわち、官能基数:5〜6、水酸基価:155〜165、酸価:4.0以下)を用いた。また、ヒマシ油系ポリオール(a1)として、ヒマシ油ポリオール(a1−1)50質量部と、ヒマシ油ポリオール(a1−2)50質量部とを用いて合計100質量部とし、これに対してエポキシ基含有アクリルポリマー(B−2)80質量部を用いた以外は、実施例1と同様の方法で硬化性ポリウレタン系樹脂組成物を得た(すなわち、実施例5)。 Furthermore, using 100 parts by mass of a commercially available castor oil polyol (a1-2) as a castor oil-based polyol (a1) and using 80 parts by mass of an epoxy group-containing acrylic polymer (B-2) with respect to this A curable polyurethane-based resin composition was obtained in the same manner as in Example 1 (that is, Example 4). As the castor oil polyol (a1-2), “POLYCASTOR # 10” (that is, functional group number: 5 to 6, hydroxyl value: 155 to 165, acid value: 4.0 or less) manufactured by Ito Oil Co., Ltd. was used. Moreover, as a castor oil type | system | group polyol (a1), it is set as a total of 100 mass parts using 50 mass parts of castor oil polyol (a1-1) and 50 mass parts of castor oil polyol (a1-2), and it is an epoxy with respect to this. A curable polyurethane resin composition was obtained in the same manner as in Example 1 except that 80 parts by mass of the group-containing acrylic polymer (B-2) was used (ie, Example 5).
実施例2〜実施例5の硬化性ポリウレタン系樹脂組成物について、実施例1と同様に初期の物性を測定した。また、実施例1と同様に、プレッシャークッカー試験及び熱耐久試験に供し、試験後の硬度をそれぞれ測定した。これらの試験結果を評価と共に、表1に併記した。 The initial physical properties of the curable polyurethane resin compositions of Examples 2 to 5 were measured in the same manner as in Example 1. Moreover, it applied to the pressure cooker test and the heat endurance test similarly to Example 1, and measured the hardness after a test, respectively. The test results are shown in Table 1 together with the evaluation.
表1の結果に明らかなように、実施例1〜実施例5の硬化物は、初期粘度、初期硬度共に、判定が良であり、プレッシャークッカー試験、高温耐久試験後の硬度も良好であった。 As is clear from the results in Table 1, the cured products of Examples 1 to 5 were good in both initial viscosity and initial hardness, and had good hardness after the pressure cooker test and the high temperature durability test. .
(比較例1、比較例2)
100質量部のヒマシ油ポリオール(a1−1)に対して、エポキシ基含有アクリルポリマー(B)に代えて、市販のビスフェノールA型エポキシ樹脂(すなわち、DER331J、ダウ・ケミカル社製)30質量部を用い、それ以外は、実施例1と同様の方法で硬化性ポリウレタン系樹脂組成物を得た(すなわち、比較例1)。また、100質量部のヒマシ油ポリオール(a1−1)に対して当量比の変性MDI(a2−1)のみを配合し、エポキシ基含有アクリルポリマー(B)を含有しない硬化性ポリウレタン系樹脂組成物を得た(すなわち、比較例2)。
(Comparative Example 1, Comparative Example 2)
30 parts by mass of a commercially available bisphenol A-type epoxy resin (that is, DER 331J, manufactured by Dow Chemical Co., Ltd.) in place of the epoxy group-containing acrylic polymer (B) relative to 100 parts by mass of castor oil polyol (a1-1) Otherwise, a curable polyurethane resin composition was obtained in the same manner as in Example 1 (that is, Comparative Example 1). A curable polyurethane resin composition containing only the modified MDI (a2-1) of equivalent ratio to 100 parts by mass of castor oil polyol (a1-1) and containing no epoxy group-containing acrylic polymer (B) (That is, Comparative Example 2).
比較例1、比較例2の硬化性ポリウレタン系樹脂組成物について、実施例1と同様に初期の物性を測定した。また、実施例1と同様に、プレッシャークッカー試験及び熱耐久試験に供し、試験後の硬度をそれぞれ測定した。これらの試験結果を評価と共に、表1に併記した。 The initial physical properties of the curable polyurethane resin compositions of Comparative Example 1 and Comparative Example 2 were measured in the same manner as in Example 1. Moreover, it applied to the pressure cooker test and the heat endurance test similarly to Example 1, and measured the hardness after a test, respectively. The test results are shown in Table 1 together with the evaluation.
表1の結果に明らかなように、比較例1の硬化物は、初期粘度、初期硬度は良好であるものの、プレッシャークッカー試験、高温耐久試験後に、それぞれ硬度が80、100に上昇した。また、比較例2の硬化物は、初期粘度、初期硬度は良好であったものの、プレッシャークッカー試験の硬度が測定不能となり、高温耐久試験後の硬度も100に上昇した。 As is clear from the results in Table 1, the cured product of Comparative Example 1 had good initial viscosity and initial hardness, but the hardness increased to 80 and 100 after the pressure cooker test and the high temperature durability test, respectively. In addition, although the cured product of Comparative Example 2 had good initial viscosity and initial hardness, the hardness in the pressure cooker test was not measurable, and the hardness after the high temperature durability test was increased to 100.
以上の結果から、ヒマシ油系ポリオール(a1)とポリイソシアネート(a2)を含む硬化性ポリウレタン系樹脂組成物に、エポキシ基含有アクリルポリマー(B)を配合することで、高温高湿環境下においてもの硬化物の軟化を抑制する効果が得られることがわかる。 From the above results, the epoxy group-containing acrylic polymer (B) is blended with the curable polyurethane resin composition containing the castor oil-based polyol (a1) and the polyisocyanate (a2), so that it can be used in a high temperature and high humidity environment. It turns out that the effect which suppresses softening of hardened | cured material is acquired.
本発明は、上記実施形態に限らず、種々の用途に応用することができる。例えば、上記実施形態では、硬化性ポリウレタン樹脂組成物の硬化物を、車載用のECUにおいて封止材として用いた例について説明したが、電装部品は車載用に限らない各種ECU又はECU以外の各種半導体装置において、電子部品その他を被覆する封止材として使用することができる。 The present invention is not limited to the above embodiment and can be applied to various applications. For example, in the above-described embodiment, an example in which a cured product of the curable polyurethane resin composition is used as a sealing material in an in-vehicle ECU is described. In a semiconductor device, it can be used as a sealing material for covering electronic components and others.
1 電装部品
11 ケース
2 封止材
3 電子部品
31、32 セラミックコンデンサ
33 ICチップ
4 基板
51〜53 導電層
DESCRIPTION OF SYMBOLS 1
Claims (5)
上記硬化性ポリウレタン系樹脂組成物は、ヒマシ油系ポリオールと、ポリイソシアネートと、エポキシ基含有アクリルポリマーとを含有する、硬化性ポリウレタン系樹脂組成物を用いた電装部品。 An electrical component (1) in which an electronic component (3) is coated with a sealing material (2) made of a cured product of a curable polyurethane resin composition,
The curable polyurethane resin composition, and castor oil-based polyol, a polyisocyanate, containing an epoxy group-containing acrylic polymers, electrical components using curable polyurethane resin composition.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016088314A JP6551294B2 (en) | 2016-04-26 | 2016-04-26 | Electrical components using a curable polyurethane resin composition |
DE112017002179.0T DE112017002179B4 (en) | 2016-04-26 | 2017-04-17 | Electrical device using a curable polyurethane type resin composition |
US16/096,435 US10717867B2 (en) | 2016-04-26 | 2017-04-17 | Curable polyurethane type resin composition and electrical device using the same |
PCT/JP2017/015505 WO2017188050A1 (en) | 2016-04-26 | 2017-04-17 | Curable polyurethane-based resin composition and electrical component obtained using same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016088314A JP6551294B2 (en) | 2016-04-26 | 2016-04-26 | Electrical components using a curable polyurethane resin composition |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2017197628A JP2017197628A (en) | 2017-11-02 |
JP2017197628A5 JP2017197628A5 (en) | 2018-08-02 |
JP6551294B2 true JP6551294B2 (en) | 2019-07-31 |
Family
ID=60160516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2016088314A Expired - Fee Related JP6551294B2 (en) | 2016-04-26 | 2016-04-26 | Electrical components using a curable polyurethane resin composition |
Country Status (4)
Country | Link |
---|---|
US (1) | US10717867B2 (en) |
JP (1) | JP6551294B2 (en) |
DE (1) | DE112017002179B4 (en) |
WO (1) | WO2017188050A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6919528B2 (en) * | 2017-11-28 | 2021-08-18 | 株式会社デンソー | Curable resin composition and electrical components using it |
JP6935734B2 (en) * | 2017-11-28 | 2021-09-15 | 株式会社デンソー | Curable resin composition and electrical components using it |
KR20220054801A (en) | 2019-08-27 | 2022-05-03 | 미쯔비시 가스 케미칼 컴파니, 인코포레이티드 | urethane resin |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2791438B2 (en) * | 1988-09-09 | 1998-08-27 | 関西ペイント株式会社 | Resin composition and method for curing the same |
US5314983A (en) * | 1992-11-09 | 1994-05-24 | Enichem S.P.A. | Process for curing polymerizable liquid compositions based on polyisocyanates and epoxides |
JP3432566B2 (en) | 1994-02-10 | 2003-08-04 | 協和醗酵工業株式会社 | Method for inhibiting hydrolysis of ester, hydrolysis inhibitor and ester composition |
US5698623A (en) * | 1994-04-28 | 1997-12-16 | Jacobs; Richard L. | Resin precursors having thixotropic properties and fillers stabilized against settling |
JP2001131472A (en) * | 1999-11-01 | 2001-05-15 | Kansai Paint Co Ltd | Resin composition for cationic electrodeposition coating |
KR100720816B1 (en) * | 2003-07-18 | 2007-05-21 | 고니시 가부시키가이샤 | Curable resin composition and cold-setting adhesive |
WO2009120211A1 (en) * | 2008-03-28 | 2009-10-01 | Basf Corporation | Polymeric compositions for plastic strapping |
DE102009008949A1 (en) * | 2009-02-13 | 2010-08-19 | Bayer Materialscience Ag | Aqueous coating systems based on physically drying urethane acrylates |
JP5435413B2 (en) * | 2009-03-23 | 2014-03-05 | セメダイン株式会社 | Curable composition |
DE102010009896A1 (en) | 2010-03-02 | 2011-09-08 | Bayer Materialscience Ag | Aqueous polyurethane dispersions |
EP2545093A4 (en) * | 2010-03-12 | 2015-01-21 | Synthezyme Llc | Polyurethane polymers comprising copolyester polyols having repeat units derived from biobased -hydroxyfatty acids |
JP5667791B2 (en) | 2010-06-15 | 2015-02-12 | 富士フイルム株式会社 | Ink and inkjet recording method |
US9832902B2 (en) * | 2013-05-31 | 2017-11-28 | Elantas Pdg, Inc. | Formulated resin compositions for flood coating electronic circuit assemblies |
AU2014293470B2 (en) | 2013-07-22 | 2018-05-10 | Basf Se | A coating system |
CN103992728A (en) * | 2014-04-17 | 2014-08-20 | 京东方科技集团股份有限公司 | Conductive material and preparation method thereof, color filter and making method thereof, and display device. |
-
2016
- 2016-04-26 JP JP2016088314A patent/JP6551294B2/en not_active Expired - Fee Related
-
2017
- 2017-04-17 WO PCT/JP2017/015505 patent/WO2017188050A1/en active Application Filing
- 2017-04-17 DE DE112017002179.0T patent/DE112017002179B4/en active Active
- 2017-04-17 US US16/096,435 patent/US10717867B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
DE112017002179B4 (en) | 2022-12-22 |
JP2017197628A (en) | 2017-11-02 |
US20190144668A1 (en) | 2019-05-16 |
US10717867B2 (en) | 2020-07-21 |
WO2017188050A1 (en) | 2017-11-02 |
DE112017002179T5 (en) | 2019-01-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2019107199A1 (en) | Curable resin composition and electrical component using this | |
CN101575405B (en) | Polyurethane resin shaping combination, sealing material and hollow fiber membrane component | |
JP6551294B2 (en) | Electrical components using a curable polyurethane resin composition | |
CN110392708A (en) | Adhesive composition based on graft resin | |
KR20120071402A (en) | Coating material for hand application | |
JP2997428B2 (en) | Polyol-based plasticized composition with controlled viscosity | |
US8454793B2 (en) | Adhesive derived from dimeric fatty acid or dimeric fatty diol | |
US20200291170A1 (en) | Curable resin composition and eletrical component using the same | |
JP7333349B2 (en) | Packaging adhesives based on renewable raw materials | |
JP6935734B2 (en) | Curable resin composition and electrical components using it | |
KR20170134413A (en) | Epoxy resin composition | |
CN101679575A (en) | One-component, moisture-curing polyurethane adhesive | |
JP2016098325A (en) | Polyurethane resin composition | |
JP2019099599A (en) | Curable resin composition and electrical component using the same | |
US11795325B2 (en) | Curable resin composition and electrical component using the same | |
KR20030064660A (en) | polyurethane adhesive for flooring and process | |
JP2004292706A (en) | Epoxy resin composition for optical semiconductor encapsulation and optical semiconductor device | |
CN120359279A (en) | Adhesive for solvent-free structure, cured product thereof, and structure | |
US5958594A (en) | Insulating Urethane-forming curable compositions and insulated electric or electronic part or device | |
CN113366062B (en) | Curable composition | |
JP7732175B2 (en) | Polyurethane adhesive composition, cured product and adhesive | |
KR20080101515A (en) | Process for producing epoxy resin composition | |
KR102764618B1 (en) | Polyurethane resin composition | |
JPH07103355B2 (en) | Urethane adhesive composition | |
CN107312129A (en) | A kind of low compression set deformation method for preparing thermoplastic polyurethane elastomer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20180619 |
|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20180619 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20190604 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20190617 |
|
R151 | Written notification of patent or utility model registration |
Ref document number: 6551294 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |
|
LAPS | Cancellation because of no payment of annual fees |